I didn't get to the World's (there was this rather inconvenient thing called work that got in the way), but after going to the World Cup in Sydney a couple of weeks before that I'm hooked (doesn't the Madison look like the most awesome fun? well, except for the bit about having to ride it at an average of ~50kph, I guess :p).
Definitely gotta arrange things better next time the Track World's are in Oz, e.g. "work" out of the Melbourne office that week. 😉